I was pretty blown away by this project.
Mikey and Wendy live on an off-grid, homestead in New Mexico (see their Holy Scrap Homestead blog). As such, they were looking for more efficiency from their appliances. Mikey has come up with a temperature controller that has allowed them convert a small chest freezer into a refrigerator and so downsize from their full-size fridge that cost them a lot in energy and was underutilized.
The temperature controller can also be used to regulate temperature for stuff like tempeh and yoghurt making, incubation, heat pads, raising bread dough, and controlling the temperature on simple crockpots and on hot plates for tasks like candy-making. There are a lot of possible uses.
The design and instructions on how to build it are “open source” in other words, free, off his website but he also sells kits to build it yourself and already completed units from there, as well.
Here is Mikey talking about the controller and what he was able to do with it. BTW, I don’t know Mikey or Wendy and they haven’t asked me to blog this. Just stumbled across this and thought it should be shared.
Here’s Wendy making yoghurt using the device:
Wendy using the temperature controller to make tempeh:
Mikey raising bread dough.
Besides the temperature controller, Mikey has other useful open source projects.